Process of dyeing vegetable fiber.



' srzlrns rarnnr orrien eUs'rAv CHRISTIAN Donn, orFRANKFORT-ON-THE-MAIN, GERM Y.

'rnocnss ormrnme VEGETA LE FIBER.

No Drawing. I

' To all whom it may concern: 7 I

Be it known that I, GU's'r-Av CHRISTIAN -D6Rn,.residng at'No.Mainluststrasse,

- Frankfort- I n the Main, Germany,- a' subject of the German Emperor,have invented newand useful Improvements in the Process of DyeingVegetable Fiber, of which the following is a specification.

This invention has for its object to 'pro-' vide'animprovedproe'essfo-r' soaking and dyeing in .a' single dye-bath all kinds ofvegetable fiber such as cotton, flax, jute, ramic, and the. like withdirect or substantive dye-stuffs.

The present inventor has dlscovered that owing totheir contained alkali,potassium silicate and sodium silicate possess the prop:

'erty'of saponifying'and removing. spinning oils and other impuritiesadhering to the fiber .and' thereby cleaning the ,fiber, andaboveallthat, owing to'theirco'ntained silica ..ple.

'- or silicicacid, they also possess the property. of; dye-stuffs ontoand into the fiber.-

The improved.

precipitating direct or substantive lows, the proportions of the severalsub-' stances being given solely byway of examgrams. of alkaliisilicateper liter of bath,

"and the dye liquorfi The fiber to be dyed. is

placed in the bath at the temperatureof blood heat, is turned over, andthe bath is heated gradually to boiling; Theboi-ling-is' continued for'about to 60 'minutes,'and

the fiber is preferably leftin the bath or an I Specification of LettersPatent.

bath; On being rocess now consists in add ng a slhcateo an alkal such aspotasa The dye bath is prepared with 20' equal period 0mm; with theobject of deep ening the shade. if

The improved processhas the advantage Patented Dec. 24, 1912.Application filed March 24, 1911. Serial No. 616,701.

that the dye bath is almost exhausted, and

that the dyed fiber isfaster to washing than is the case'with' theexisting rocesses of dyeing with salts, etc., and furt er that the dyeis not so liable to run .;.from "the dyed fiber int-o adjacent undy'edve etable fiber when being washed or fulled. wing to the .property ofalkali silicates of removing impurities from vegetable fibers, it is notnecessary with the' improved process to boil the fiber before placingthe latter in the dye left for. about 15 minutes 1 .in the hot silicatedye bath, the fiber-becomes completely soaked and will take the dyeuniformly. Organic and inorganic salts ancLTurkey red oil or itsderivatives,'may be added to the dye bath.

Having now described my inventionwhat I claim as new and deslre tosecure by Letters Patent.1s:

. 1. The process of soaking and dyeing vege-' alkali which soaks andcleans the fiber and table fiber in a single bath of a directorsubstantive dye containing a silicate of we;

. precipitates the dyestufl? thereon, asset-forth,

. 2; The process of soaking and dyeingvegetable fiber in a single bathof a direct or sub st'antive dye containing a slhcate of an al-.

kaii and-an addition of a salt, 'as set forth: 1 In testimony whereof I'have signed. my name to this specification in the presence of twosubscribing witnesses.

' GUSTAV CHRISTIAN Witnesses KA'nn MERZ,

JEAN Group.

